In your opinion, which faction is the strongest in Heroes 5? Let's discuss the advantages and disadvantages of each faction.

what I find amusing about them is that they are resilient, and dragons (if I'm not mistaken) can attack two units (if they are standing in the same row).

Added after 9 minutes
yes, I agree that they are not very strong, but it should be noted that liches in Necropolis are not very weak units, and if you add plague to their arsenal, I think they will compensate for the weakness of skeletons or zombies. And I also agree with Tsar1997 that all factions are unique in their own way.